#!/usr/bin/env python3
# ==============================================================================
# COPYRIGHT NO ONE EVERYWHERE LLC (WYOMING HOLDING COMPANY)
# PROJECT: SOVEREIGN STACK
# This artifact is entirely proprietary and cryptographically proven.
# Open-Source usage requires explicit permission from Brandon Scott Schneider.
# ==============================================================================
"""
Z-Bridge Protocol: Auditable Shielded-to-Transparent Orchestrator
Manages states for ZEC accumulation, shielding, and unshielding.
"""

import json
import time
import hashlib
from pathlib import Path
from dataclasses import dataclass, asdict
from typing import Dict, List, Optional

ROOT = Path(__file__).resolve().parent.parent
STATE_FILE = ROOT / "z_bridge_state.json"
TARGET_T_ADDRESS = "t1eC3RZuqBjEnXcT45RQGVPScxJYoSmdWPy"

@dataclass
class ZBridgeEvent:
    timestamp: float
    state: str
    amount_zec: float
    source: str
    destination: str
    attestation_hash: str
    tx_payload_ready: bool = False

class ZBridgeProtocol:
    def __init__(self, z_address: Optional[str] = None):
        self.z_address = z_address
        self.state = self.load_state()
        
    def load_state(self) -> Dict:
        if STATE_FILE.exists():
            with open(STATE_FILE, 'r') as f:
                return json.load(f)
        return {
            "bridge_id": f"Z-BRIDGE-{int(time.time())}",
            "config": {
                "target_t_address": TARGET_T_ADDRESS,
                "shielded_pool_z_address": self.z_address or "__PENDING_USER_Z_ADDRESS__",
                "viewing_key": "__PENDING_USER_INPUT__"
            },
            "status": "INITIALIZED",
            "totals": {
                "accumulated_zec": 0.0,
                "shielded_zec": 0.0,
                "settled_zec": 0.0
            },
            "history": []
        }

    def save_state(self):
        with open(STATE_FILE, 'w') as f:
            json.dump(self.state, f, indent=2)

    def log_event(self, state: str, amount: float, source: str, destination: str):
        event_time = time.time()
        # Map state to TSM opcode
        opcode_map = {
            "ACCUMULATING": "0x01",
            "SHIELDING_PENDING": "0x31",
            "SHIELDED": "0x31",
            "UNSHIELDING_PENDING": "0x32",
            "SETTLED": "0x32"
        }
        opcode = opcode_map.get(state, "0x00")
        
        # Generate Precision-Locked Attestation
        attestation_input = f"{opcode}|{state}|{amount}|{source}|{destination}|{event_time}"
        attestation_hash = hashlib.sha256(attestation_input.encode()).hexdigest()
        
        event = ZBridgeEvent(
            timestamp=event_time,
            state=state,
            amount_zec=amount,
            source=source,
            destination=destination,
            attestation_hash=attestation_hash
        )
        self.state["history"].append(asdict(event))
        self.state["status"] = state
        self.save_state()
        print(f"[*] STATE TRANSITION: {state} | Opcode: {opcode} | Amount: {amount} ZEC")
        print(f"    Attestation: {attestation_hash}")

    def update_accumulation(self, amount: float):
        self.state["totals"]["accumulated_zec"] += amount
        self.log_event("ACCUMULATING", amount, "Exchange_API", "Exchange_Wallet")

    def prepare_shielding(self, amount: float):
        if self.state["config"]["shielded_pool_z_address"] == "__PENDING_USER_Z_ADDRESS__":
            print("[!] ERROR: Cannot shield without a Z-Address.")
            return
        
        print("\n=== SHIELDING INSTRUCTIONS (Withdrawal from Exchange) ===")
        print(f"Step 1: Go to your Exchange withdrawal page.")
        print(f"Step 2: Asset: Zcash (ZEC)")
        print(f"Step 3: Amount: {amount} ZEC")
        print(f"Step 4: Destination: {self.state['config']['shielded_pool_z_address']}")
        print("========================================================\n")
        
        self.log_event("SHIELDING_PENDING", amount, "Exchange_Wallet", self.state["config"]["shielded_pool_z_address"])

    def confirm_shielded(self, amount: float):
        self.state["totals"]["shielded_zec"] += amount
        self.log_event("SHIELDED", amount, self.state["config"]["shielded_pool_z_address"], "Shielded_Pool")

    def prepare_unshielding(self, amount: float):
        print("\n=== UNSHIELDING INSTRUCTIONS (Forwarding to Coinbase) ===")
        print(f"Source: {self.state['config']['shielded_pool_z_address']}")
        print(f"Destination: {self.state['config']['target_t_address']}")
        print(f"Amount: {amount} ZEC")
        print("Note: This transaction will be public on the blockchain.")
        print("========================================================\n")
        
        self.log_event("UNSHIELDING_PENDING", amount, "Shielded_Pool", self.state["config"]["target_t_address"])

    def confirm_settled(self, amount: float):
        self.state["totals"]["settled_zec"] += amount
        self.log_event("SETTLED", amount, "Shielded_Pool", self.state["config"]["target_t_address"])

if __name__ == "__main__":
    # Example simulation of the lifecycle
    bridge = ZBridgeProtocol()
    
    # 1. Start Accumulation
    bridge.update_accumulation(1.0)
    
    # 2. Set Z-Address (User would provide this)
    bridge.state["config"]["shielded_pool_z_address"] = "zs1...mock...zaddress"
    
    # 3. Request Shielding
    bridge.prepare_shielding(1.0)
    
    # 4. Confirm Shielded (Manual step after blockchain confirmation)
    bridge.confirm_shielded(1.0)
    
    # 5. Request Unshielding (Forwarding)
    bridge.prepare_unshielding(1.0)
    
    # 6. Confirm Settled
    bridge.confirm_settled(1.0)
    
    print("\n[+] Bridge state updated in z_bridge_state.json")